Mark sockets on accept().

(cherry picked from commit 58b1f3f6a30a660ad81637c2b50382c3d279243b)

Change-Id: I5d09be413cf720fbed905f96313b007997ada76c
diff --git a/libc/Android.mk b/libc/Android.mk
index ed7d055..817c767 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -98,6 +98,7 @@
 
 libc_bionic_src_files := \
     bionic/abort.cpp \
+    bionic/accept.cpp \
     bionic/access.cpp \
     bionic/assert.cpp \
     bionic/atof.cpp \